'04 Cavalier, 120K mi. We've had it for 6 years, driven every winter. Now, this winter, we occasionally get an ABS fault. This probably always occurs under slipping conditions. When it happens, the 'Low Trak' light also comes on. So, it would be a 'Yeah, so?' thing, except it didn't happen before, and, I don't see this winter's driving as any different than prior years.
Tires are not new, but more than legal; I would say tread is about 'normal' for us - so, again, not markedly different than prior years. I also swapped them (front <-> rear), which didn't change anything.
Suspension is OK, AFACT, though the rear struts are old. In any case, the fault doesn't correlate with bouncing or such.
Edit (OP): The ABS (always, I think) works normally, and doesn't fault, when the brakes are applied. The fault occurs when there's slip under torque. Even, pretty minimal torque. I don't know if it happens every time there's slip. It seems unlikely, but I can't rule it out.
Q: Why the change?
Bonus Q: Once a fault occurs, ABS is disabled until the car is shut off and restarted. Why would they design it that way? If ABS is safer, isn't this unnecessarily less safe?